Chemistry, 23.12.2019 07:31 nataliahenderso
In an experiment to determine the acceleration due to gravity, one student holds a pencil at arm’s length and drops it. another student starts a timer when the first student lets go and stops the timer when the pencil hits the ground. they repeat this several times and take an average. is this a valid experiment, why or why not?
a. no, it is not valid because they are only dropping one item.
b. no, it is not valid because taking the average will increase rounding error.
c. yes it is valid.
d. no, it is not valid because the short distance means there will be a lot of error due to the student’s reaction time.
Answers: 2
Chemistry, 22.06.2019 02:10
3.) for each of the following compounds, draw the major organic product of reaction with hcl or naoh and circle whether the starting materials and products will be more soluble in organic solvent or water benzoic acid + hcl: benzoic acid + naoh: oh benzoic acid water/organic water organic fluorenone hс: fluorenone + naoh: fluorenone water/organic water/organic веnzocaine + hci: benzocaine + n»oh: h2n benzocaine water/organic water organic o=
Answers: 3
Chemistry, 22.06.2019 10:30
Consider the following reactions. (note: (s) = solid, (l) = liquid, and (g) = gas.) mg(s) + ½o2(g) → mgo(s) + 146 kcal/mole h2(g) + ½o2(g) → h2o(g), δh = -57.82 kcal/mole what type of reaction is represented by the previous two examples?
Answers: 3
Chemistry, 22.06.2019 10:30
Acompound has a molar mass of 92.02 grams/mole, and its percent composition is 30.4% nitrogen (n) and 69.6% oxygen (o). what is its molecular formula? a. n2o4 b. no2 c. n2o d. n4o2
Answers: 1
Chemistry, 22.06.2019 13:00
Imagine that you push on a large rock. at what point does your effort change the rock’s mechanical energy?
Answers: 1
In an experiment to determine the acceleration due to gravity, one student holds a pencil at arm’s l...
English, 24.07.2019 09:00
Mathematics, 24.07.2019 09:00
Biology, 24.07.2019 09:00
English, 24.07.2019 09:00
History, 24.07.2019 09:10
History, 24.07.2019 09:10
English, 24.07.2019 09:10
History, 24.07.2019 09:10
Chemistry, 24.07.2019 09:10
Advanced Placement (AP), 24.07.2019 09:10